Which of the following is not a common refrigerant ?
Which of the following is not a common refrigerant ?
A. Freon-12
B. Ethylene
C. Ammonia
D. Carbon dioxide
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Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a _____________ vapour?
Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a _____________ vapour?A. Superheated
B. Desuperheated
C. Non-condensable
D. None of theseWhich of the following decreases with increase in pressure ?
Which of the following decreases with increase in pressure ?A. Melting point of ice
B. Melting point of wax
C. Boiling point of liquids
D. None of theseWhat is the value of ln y (where y = activity co-efficient) for ideal gases ?
What is the value of ln y (where y = activity co-efficient) for ideal gases ?A. Zero
B. Unity
C. Infinity
D. NegativeIf the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the _________________?
If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the _________________?A. Maxwell’s equation
B. Clausius-Clapeyron Equation
C. Van Laar equation
D. Nernst Heat TheoremAt 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is__________________?
At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is__________________?A. 1.572
B. 1.9398
C. 3.389
D. 4.238Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is__________________?
Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is__________________?A. 2
B. 0
C. 1
D. 3